also EKG) machine in the format of a business card, complete with an OLED display. We’ve seen business card hacks before, but that was the coolest. But that’s peanuts compared with the serious ...

On the bottom right, there’s a PID controller dial for temperature precision, and on the left, you’ll find its LED display screen. You’ll find two switches on the back of the Corvo’s EKG ...

[Dániel] chose an ESP32-S3, programmed in Rust, to interface with the SPI bus and drive a 1″ OLED display that shows the digitized ECG signal. It also runs the user interface, which is operated ...